Lawn-mower.



PATENTED AUG. 22, 1905.

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F. R.. NEUHAUS.. LAWN MOWBR.

APPLIGATION FILED 11u20. 1905.

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FRIEDRCH R. NEUl-IAUS, OF SOLINGEN, GERMANY.

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Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed May 20,1905. Seria] No. 261,315.

To all 'Ll/71,0797, t r11/ty concern:

Be it known that I, FRIEDRICH R. Nun- HAUs, a citizen of the German Empire, and a resident of Solingen, Germany, have invented certain new and useful Improvements in Lawn-Mowers, of which the following is a' there were always some of the ends of the said blades or counter-blades which failed to cross at the proper moment, the result being that the grass-plants were in some places pushed aside by the rotating knives and laid down by the wheels of the machine, so that even when the latter was repeatedly passed over a spot on the lawn there still remained strips of uncut grass.

My invention relates to a lawn-mower of the construction referred towhere the disadvantage described is obviated, the ends of all the knives and counter-blades of a machine embracing the grass-plants and duly crossing each other at once, so that the grass cannot be scrutched inte the spaces between the blades, but is equally and cleanly cut off.

My device is illustrated on the drawings herewith, in which-- Figure l is a longitudinal section, Fig. 2 a transverse section, and Fig. 3 a plan, of a easing and knife hereinafter referred to, while Fig. 4L shows in section the operating mechanism and adjusting device, also referred to below.

As can be readily seen from the said illustrations, the counter-blade a has been given the shape of a hood or bell providedwith radial straight-edged cutting-teeth and is mounted either above or beneath another rotatory knife which is provided with sickle-shaped teeth or grips c c and operated by the wheels or rollers el. rlhe sickle-shaped teeth c are provided with concave cutting edges, which are set back from the radii passing' through the apexes of the teeth, so that segmental openings are formed between the radial teeth and the sickle-shaped teeth when their points meet.

The adjustment of the blades a and :for cutting the grass in any desired length, and which .I do not mean to be a feature of myinvention, may be brought about by providing' the hoodshaped blade (it, carryingthe teeth e, with spiral thread, by means of which it lnay be adjusted, being screwed upon a bolt/, and may then be particularly secured by means of a nut m. The said bolt 7;' is secured to a casing s, in which the driving-shaft g is supported and rotates with the hub of the wheel. The adjustment of the said blade a, adjusts at the same time the cutting-blade L, the latter carrying a journal-box l concentric with another central box u, that carries blade a and being', by means of a suitable key and corresponding groove, so arranged that it may slide in a miter-wheel zi, by which it is set in motion. The said miterwheel t', which is rotated by a wheel /t on the shaft g, is held fast and supported by the arms n, rigidly secured to the casing s, so that a disarrangement is obviated. l/Vhen the said blades at and provided, respectively, as aforesaid, with the cutting-teeth and grips, are to be adjusted to a certain height, this may be done by correspondingly adjusting the nut m and the blade (t, whereby the cutting-blade b is lifted by means of a swelling p, provided at the bottom of the aforesaid box u of the blade a. while the lowering of the blade may be effected by screwing down the said blade a.

The driving wheels or rollers d may be mounted within the annular toothed cuttingblade a so as to require no extra space and at the same time prevent the laying down of any grass. rl`he cutting-blade L is rotated by the wheels 2, which are provided with an interior annular rack and meshing with the gearsf, mounted on the said shaft f/, the bevelgear /i sitting, as aforesaid, on the said shaft g, engaging in the miter-wheel i', which drives the box Z with the cutting-blade b. Behind the rotating cutters there may be provided a guide-roller e to prevent a too easy tilting of teeth, whereby segmental openings are formed the machine and to facilitate theii1 continuous between the radial teeth and the sickle-shaped keeping in proper position during the Work. teeth, substantially as specified.

Vhat Iclaim as my invention, and desire to Signed by me at Solingen, Germany, this protect by Letters Patent, is 6th day of May, 1905.

AlaWn-rnower provided with ablade having' FRIEDRGH R. NEUHAUS radial straight-edged teeth, and a rotatory coacting blade having sickle-shaped teethg the litnesses:

concave cutting edges of which are set back JUL. KOSSBAUER, from radii passing through the apexes of the W. R. ESTES. 

